CVE-2019-20330 Deserialization of Untrusted Data in jackson-databind

What is CVE-2019-20330?

CVE-2019-20330 is a critical unsafe deserialization vulnerability in Debian Debian Linux, published on 3 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

FasterXML jackson-databind 2.x before 2.9.10.2 lacks certain net.sf.ehcache blocking.

Weakness: CWE-502

Which versions are affected by CVE-2019-20330?

8 open source packages ship an affected version, including com.fasterxml.jackson.core:jackson-databind. It affects 30 products.

Products include Debian Debian Linux, Fasterxml Jackson-Databind, Netapp Active Iq Unified Manager, Netapp Oncommand Api Services, Netapp Service Level Manager, Netapp Snapcenter and 24 more.

How do I fix CVE-2019-20330?

Upgrade com.fasterxml.jackson.core:jackson-databind to a fixed version for your release line: 2.6.7.4, 2.7.9.7, 2.8.11.5 or 2.9.10.2.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2019-20330 being exploited?

There is no known exploitation of CVE-2019-20330 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as CLEANSTART-2026-MC90511, DEBIAN-CVE-2019-20330, GHSA-gww7-p5w4-wrfv, ROOT-APP-MAVEN-CVE-2019-20330, UBUNTU-CVE-2019-20330.